How To Use Cupel In A Sentence
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When the cupel shows signs of the presence of these metals in objectionable quantity, it is well to repeat the assay and scorify so as to remove them before cupellation.
A Text-book of Assaying: For the Use of Those Connected with Mines.
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To them is due the discovery of antimony, sulphuric ether and phosphorus, the cupellation of gold and silver, the determining of the properties of saltpetre and its use in gunpowder, and the discovery of the distillation of essential oils.
The Majesty of Calmness; individual problems and posibilities
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The lead alloy was then separated into its component metals by cupellation.
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In the latter case it is best to scorify the lead down to something less than 1 gram, and to perform the cupellation on a specially prepared small fine cupel.
A Text-book of Assaying: For the Use of Those Connected with Mines.
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But the satisfaction was at its height when the crucible produced, after cupellation, a button of
The Land of Midian
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The bad effect of a higher temperature in increasing the cupellation loss need hardly be considered in the case of such small buttons of gold as are obtained in assaying gold ores, as any loss there may be is hardly appreciable by the balance.
A Text-book of Assaying: For the Use of Those Connected with Mines.
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The assay of gold-zinc slimes, which is the precipitate formed by zinc acting on cyanide solutions of gold, may be made by wrapping 2 or 3 grams in 40 grams of sheet lead and scorifying, cupelling, &c. The amount of impurity in the stuff varies greatly; it is usually calcined and mixed thoroughly with soda 40 per cent., borax 30 per cent., and sand 10 per cent., and melted in graphite pots.
A Text-book of Assaying: For the Use of Those Connected with Mines.
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According to our shopper, the assayer would make up a tray of aged bone-ash, magnesium or cement cupels into which crushed ore along with a button of lead was added.
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FIRE ASSAY* smelting with gold collector, separation, cupellation muffle or retort furnace, crucible, cupel taste (assay) lead, borax, soda, potash chemical
Chapter 20
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Refer to the table on page 105 to find what weight of lead is required for cupelling
A Text-book of Assaying: For the Use of Those Connected with Mines.
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The appliances in connection with mining and metallurgy include a five-stamp battery, Blake crusher, automatic machine jigs, an engine pulverizer, a Root and a Sturtevant blower, with blast reverberating, wasting, cupellation, and fusion furnaces, and all other means for reducing ores.
Scientific American Supplement, No. 446, July 19, 1884
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We found his crucibles and cupels, ceramics that these people used to test rocks to see if they contained any precious metals.
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Silver lead alloys, cupellation of, 98 sampling of, 157
A Text-book of Assaying: For the Use of Those Connected with Mines.
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The lead button is cupelled to oxidize the lead leaving behind a dore bead containing the precious metals.
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During cupellation, osmium and ruthenium are partly volatilised and iridium is partly absorbed by the cupel.
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Ordinary bone ash, air dried cupels must be placed in the muffle close together in transverse rows, sufficiently far back for uniform temperature.
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Very ornamental, this cupel is an interesting mixture between wood and wicker.
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On the other hand, the use of cupel keys is extremely economical, which is why fabricants use them in products where they are only used occasionally.
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On cooling, the prill is carefully extracted from the cupel.
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As the samples become molten, the base metals, including the lead, vaporize or absorb into the cupels, leaving only the precious metal on top.
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Cupel tongs are adequate for moving bigger range of cupels used in ore analysis.
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~ [23] -- The cupellation of lead for gold differs very little from that of lead carrying silver.
A Text-book of Assaying: For the Use of Those Connected with Mines.
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For a week or so, we had the theory, the cupels, the lead, and the traces of silver, but no gold.
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But the cupellation loss is smaller with less gold and greater with more copper, and it so happens in these assays that these two opposites nearly neutralise one another.
A Text-book of Assaying: For the Use of Those Connected with Mines.
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~ -- The silver is best separated in the wet way before cupelling, but if the proportion is not too small, it can be found by cupellation.
A Text-book of Assaying: For the Use of Those Connected with Mines.
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If the button left on cupelling the lead from an assay of an ore appears white, it is best to assume that it already contains at least a sufficiency of silver, in the absence of any knowledge to the contrary.
A Text-book of Assaying: For the Use of Those Connected with Mines.
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_ When the gold is alloyed with easily oxidizable metals, such as copper or lead, it may be refined by cupellation.
An Elementary Study of Chemistry
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The cupel is necessarily porous, and particles of metal may perhaps drain into it, more especially if the bone ash is not in fine powder; but if this is the main source of loss it is hard to see why, in cupelling equal weights of silver and gold, the loss is not equal in each case.
A Text-book of Assaying: For the Use of Those Connected with Mines.
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I burned and crushed bones to make my bone-dust for cupelling, and thus provided made nearly forty assays, some of which were afterwards checked in Adelaide, in each instance coming as close as check assays generally do.
Getting Gold: a practical treatise for prospectors, miners and students
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-- Gold, obtained by cupelling and "parting," is for most purposes sufficiently pure.
A Text-book of Assaying: For the Use of Those Connected with Mines.
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Then a little lead (also weighed) is rolled up with the flake of silver and the two are melted at a great heat in a small vessel called a cupel, made by compressing bone ashes into a cup-shape in a steel mold.
Roughing It
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... cupeled with severe penalties for anyone using these services outside of the regulated market. recipe for a black market, I am afraid.
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This quantity will be well worth working, provided the lead is abundant: Probably one pound of silver in a ton of lead would more than repay the cost of extraction, as lead yielding only four ounces to the ton is said to be profitably cupelled in Great Britain.
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Some assay beads disappear, collapse, hide under the surface, or spread out flat while being cupelled, just as the last tiny bit of liquid litharge is driven off.
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Here, the area of the rock engravings is delimited, at its ends, by two big cupels engraved in the platforms of the rocky bank; both have been carefully engraved and are deep and well finished.
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Lead cube contains any precious values and is ready for cupelling.
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A cupel or cupelling hearth in which precious metals are melted for trial and refinement.
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The lead button produced is scorified and cupelled leaving a bead of precious metal.
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I burned and crushed bones to make my bone-dust for cupelling, and thus provided made nearly forty assays, some of which were afterwards checked in Adelaide, in each instance coming as close as check assays generally do.
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Gold and silver bullion that remains in a cupelling furnace after the lead has been oxidized and skimmed off.
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There are six steps in the fire assay procedure: splitting - weighing - mixing firing - cupelling - parting.
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Do you have a furnace capable of cupelling?
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The prill is cupeled as described above to determine the precious metal content.
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When introducing a fresh cupel or test, the fire must be low and heat must be applied with great caution, or otherwise the bone ash will split to pieces; and for the same reason the bone ash must be dried very gently.
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In a well-ventilated furnace, the lead melted, oxidized and passed into the pores of the cupel, leaving only a bead of precious metals.
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When cooled, the lead is separated from the glass and then cupelled.
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That which would remain in the cupel if one should assay a phantom.
INTERNET WIRETAP: The Devil's Dictionary, by Ambrose Bierce (1993 Edition)
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FIRE ASSAY* smelting with gold collector, separation, cupellation muffle or retort furnace, crucible, cupel taste (assay) lead, borax, soda, potash chemical
Chapter 20
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In fact, in routine assays, where the quantity as well as the quality of the gold is known within fair limits, it is often the custom to add the silver for inquartation to the lead during the first cupellation.
A Text-book of Assaying: For the Use of Those Connected with Mines.
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The determination may also be made by cupelling the button of lead got in the dry lead assay.
A Text-book of Assaying: For the Use of Those Connected with Mines.
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You need to do it in a cupel of circumstances, when you are working on something or talking to someone.
Welcome to the machine at Helpful Technology
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To extract the silver, the Greeks roasted the ore and then cupelled the molten metal.
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The metal in the cupel melts and will be observed to become smaller as the process proceeds.
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Once cooled, the bead is removed from the cupel and weighed.
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Think of the cupel as a small smelt to produce ore.
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This property is taken advantage of in the operation of calcining, scorifying, cupelling, &c. The importance of a free access of air in all such work is seen when it is remembered that 1 litre of air contains 0.2975 gram of oxygen, and this quantity will only oxidise 0.1115 gram of carbon, 0.2975 gram of sulphur, or 3.849 grams of lead.
A Text-book of Assaying: For the Use of Those Connected with Mines.
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... cupeled with severe penalties for anyone using these services outside of the regulated market.
Politics.ie - 3,4,5,6,7,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,27,28,29,30,32,33,34,35,36,37,38,39,41,42,48,49,50,52
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January 12, 2008 at 1:28 pm salesman kitteh sez to cupel:
THIRD WHEEL CAT - Lolcats 'n' Funny Pictures of Cats - I Can Has Cheezburger?
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I sawd a led baloon fly on myfbusterz a cupel uv weeks ago.
I gotz u a rly good book… - Lolcats 'n' Funny Pictures of Cats - I Can Has Cheezburger?
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The precious metals assay by cupellation is the most ancient and most used method for the analysis of precious metals.
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It is no matter if the liquor is a little bit turbid; transfer it to a lead dish, evaporate, scorify, and cupel in the usual fashion.
A Text-book of Assaying: For the Use of Those Connected with Mines.
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These which form a renaissance laboratory include eight hundred relics, including triangular crucibles, shallow scorifiers, bone-ash cupels, aludels, and other artifacts.
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When the gold is accompanied by a larger proportion of silver, and both have to be determined, the cupellation must be conducted exactly as in a silver assay, the usual precautions being taken to moderate the temperature so as to lessen the cupellation loss and to promote a slow and undisturbed solidification in order to avoid spirting.
A Text-book of Assaying: For the Use of Those Connected with Mines.
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We produce several capacity crucibles and cupels and only use selected virgin materials for production.
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But in certain cases, more especially where large amounts of metallic oxides are present, the slag is not so clean, and with these the slag should be powdered, mixed with 40 grams of litharge and 4 of flour, and melted again; it is an advantage to add a small prill of say 2 or 3 milligrams of silver to the charge, as it insures a visible product in the cupellation.
A Text-book of Assaying: For the Use of Those Connected with Mines.
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The alloy left after cupelling was made up of 1 part of gold to
A Text-book of Assaying: For the Use of Those Connected with Mines.
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The muffle used for this purpose must not be used at the same time for cupelling; a gas muffle (fig. 22), such as one of Fletcher's, is best.
A Text-book of Assaying: For the Use of Those Connected with Mines.
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The fire assay begins by combining your sample with pure silver and pure lead in a process called cupelling.
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-- Ordinary lead is calcined in a cupel made of cinders or powdered bones; the lead is changed to a cinder which disappears into the cupel, and a button of silver remains.
The Story of Alchemy and the Beginnings of Chemistry
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Make a preliminary assay by cupelling 0.1 gram of the alloy with 1 gram of assay lead; calculate the percentage composition.
A Text-book of Assaying: For the Use of Those Connected with Mines.
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No doubt the high silver content of Mendip lead was an important factor in its early exploitation, but we have no means of assessing either the total output of lead or of the amount of silver extracted from it by cupellation.
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In cupellation the lead button is again heated in a furnace at 960°C to 1000°C, but this time in a bone ash cup or cupel.
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‘They sat down and cupelled about two-thirds of their galena before they realized that they were wasting their time,’ he said.
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The plant consisted of a ‘double German cupola’, a German style cupelling furnace and two 4-foot wooden housed fans (one was a backup unit).
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Absorption is facilitated by manufacture of the cupel from a porous material such as bone ash.
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As far as the historical aspects are concerned, it is necessary to mention the Romanesque Baptistry and the adjacent cupelled boulder with Celtic engravings.
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Then the drill filings from drilling in several parts of the brick are then cupelled and assay results determines the purity and thus the sale price to our hypothetical customer.
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After cooling the lead button is separated from the slag and cupelled at 1000°C to recover the silver (doré bead) plus gold, platinum and palladium.
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The product is then cupelled to increase the dross to the range of about 50-65% by weight bismuth.
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The cupel with the lead is placed back into the furnace and heated at 1000 degrees or so.
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Extensive knowledge and experience are required in such matters as making the bone-ash cupels, fine proof gold and silver, testing acids, and other special examinations and operations.
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June 28, 2008 at 3:53 am oh and I needz u to go ahead nd cum in on sunday 2. c we haz had a cupel uf layofs nd we sorta needz to pleh catchup
Yeaaah…I’m gonna need you - Lolcats 'n' Funny Pictures of Cats - I Can Has Cheezburger?
